This study was designed to be the first step in an empirical investigation of the female offender, using biographical information. It Is the goal of the research to eventually be able to predict probable criminal activity among women. The most readily delineated group for study was female prisoners. The purpose of the study was to determine if factor clusters could be produced which were representative of women in prison. Specific objectives were to organize descriptive biographical information of incarcerated women and to correlate bio-data results with important current and post-incarceration events. This study makes it clear that merely labeling behavior as criminal—connoting a deviant class of behavior—is highly inexact in identifying it. The female offender cannot as yet be defined in the same way as a person suffering from depression, hypochondriasis, or schizophrenia—that is, by distinctive response groupings. While this study made many inroads, generating descriptive factors and significant behavioral/life-history correlates, incarcerated female offenders as a class cannot as yet be identified by responses that make up a valid category of behavior.